/Engine/Source/Editor/PlacementMode/Public/IPlacementModeModule.h
typedef [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< bool(const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FPlaceableItem](API\Editor\PlacementMode\FPlaceableItem) > &)> TPlaceableItemPredicate